
Alina Adriana MineaGheorghe Asachi Technical University of Iași | TU Iasi · Faculty of Materials Science and Engineering
Alina Adriana Minea
Full Professor, dr.habil.
Convection heat transfer, new nanoparticle enhanced fluids
About
162
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Introduction
Alina Adriana Minea currently works at the Department of Technologies and Equipments for Materials Processing, Gheorghe Asachi Technical University of Iasi. Alina Adriana does research in Industrial Engineering, Materials Engineering and Engineering Physics. Her major current projects are 'Nanouptake_ COST action.' and "NanoRound".
Her work is based on numerical and experimental studies in developing new heat transfer fluids as well as heat transfer enhancement techniques for saving energy.
Additional affiliations
March 2018 - present
June 2016 - February 2018
March 1998 - June 2019
Publications
Publications (162)
Fluids thermal transfer is of utmost relevance in a large number of industrial or semi industrial applications. On the other hand, the need for environmental friendly new fluids plays a relevant role in the heat transfer agent selection. Poly(ethylene glycol) are synthetic, hydrophilic, biocompatible polymers with extensive use in a large number of...
Heat exchangers are widely used in most heat transfer applications, and further improvements are necessary to limit the growing energy demand. In this context, performance improvement studies of shell-and-tube heat exchangers have gained importance. Although many studies have been conducted on this heat exchanger in the literature, research on the...
Fluids plays a significant role in all heating and cooling processes, while their thermal conductivity is extremely relevant for a large number of heat exchange applications. This paper mainly discusses the results of an experimental study on thermal conductivity of PEG 400 and two oxide nanocolloids with MgO and TiO 2 , together with an analysis o...
This paper proposes a classification methodology aimed at identifying correlations between job ad requirements and transversal skill sets, with a focus on predicting the necessary skills for individual job descriptions using a deep learning model. The approach involves data collection, preprocessing, and labeling using ESCO (European Skills, Compet...
In the last years, a lot of research is committed to developing new heat transfer fluids for medium to high
temperatures applications. This experimental analysis is dedicated to a less studied fluid, PEG 400 enhanced with
titanium oxide nanoparticles, and started with suspensions manufacturing, morphology analysis and a strong
discussion on viscosi...
The design and manufacturing of phase change materials for thermal energy and thermal runaway studies increased tremendously over the last years. A major attention is given to thermal runaway, especially in these years where biomass reactors are extremely necessary and at the forefront of research attention. In this short review paper, several aspe...
Ionic liquids are deliberated, lately, as the perfect candidate for new heat transfer fluids. This article aims to debate on several experimental outcomes in terms of viscosity and isobaric heat capacity for [C4mim][BF4] ionic liquid and several suspensions of Al2O3 nanoparticles (up to 2.5 mass%) in [C4mim][BF4]. The methodological approach involv...
The aim of this study is to examine the hydrothermal behavior of Fe3O4 Ferrofluid flowing under the effect of uniform magnetic field (0 T ≤ B ≤ 0.3 T). In addition, magnetic field locations were changed for each experiment to observe effect of the magnetic field locations (x/D = 20, 40, 60) on the hydrothermal behavior of the proposed system. Fe3O4...
This paper aims to provide some insights into the pH and electrical conductivity of two classes of nanocolloids with PEG 400 as the base fluid. Thus, nanoparticles of two oxides—MgO and TiO2—were added to the base fluid in 5 mass concentrations in the range 0.25–2.5 %wt. The stability was evaluated in terms of pH at ambient temperature, while the e...
Nanocolloids are receiving considerable attention in regard to their properties and future applications, especially as heat transfer fluids and phase change materials for energy storage. Additionally, studies on ionic liquids and ionic-liquid-based nanocolloids are at the forefront of research preoccupations. This study aims to shed light on applic...
This Special Issue is a continuation of the previous successful Special Issue, entitled “Future and Prospects in Nanofluids Research”, co-edited by the present Editor and dedicated to the topic of “Thermophysical Properties of Nanocolloids and Their Potential Applications” [...]
In the last years, a lot of research is dedicated to development of new heat transfer fluids. Phase change materials (PCM) are considered a new generation of heat transfer fluids. A convenient tool to verify the efficiency of a fluid PCM for different practical applications is the simulation approach. In order for such an analysis to be possible, i...
In this paper, two types of nanoparticles were used to manufacture nanoenhanced PEG 400 fluids. Both types of nanofluids (i.e. Al2O3 and ZnO with PEG 400) were experimentally studied in regard to their morphology, thermal stability, porosity and thermophysical properties. This research presents an analysis of possible behavior at heat transfer for...
Ionic liquids are a very new class of fluids with excellent tunable properties and recently considered also for heat exchange applications. This review paper come into support of the 1-Butyl-3-methylimidazolium tetrafluoroborate ionic liquid state of the art, shedding some light on its properties, general applications and use as possible heat trans...
In this short review, the nanofluids based on graphene and graphene derivatives are discussed in terms of thermophysical properties. Regular heat transfer fluids as water, ethylene glycol, mixtures of those two as well as oils, ionic liquids, or other glycols are widely used in most of the cooling and heating applications. Nevertheless, nanoparticl...
Ionanofluids (INF) are combinations of ionic liquid (IL) and nanoparticles (NP) with superior thermophysical properties. In the present study, measurement of thermophysical profile of IL, 1-ethyl-3-methylimidazolium chloride ([EMiM]Cl) in which Al2O3 NPs are dispersed were undertaken in the temperature range of 303.15–333.15 K. INFs were prepared b...
Cooling and heating are extremely important in many industrial applications, while the thermal performance of these processes generally depends on many factors, such as fluid flow rate, inlet temperature, and many more. Hence, tremendous efforts are dedicated to the investigation of several parameters to reach an efficient cooling or heating proces...
In this study, Graphene Ionanofluid (INF) was prepared and investigated in the temperature range of 30–60 °C for stability, pH, density, specific heat, viscosity, thermal, and electrical conductivity. These new fluids are produced by dispersing the Graphene NPs in ionic liquid (IL) 1-ethyl-3-methylimidazolium chloride [EMiM]Cl in the concentration...
Recent studies in the field of thermal engineering revealed that employing nanofluid as a working fluid in a specific channel, considering both turbulators and magnetic field effect is scarce. Studies on the convective heat transfer performance of the thermal systems focus mostly on the effect of using either nanofluid as a new fluid, magnetic fiel...
The main aim of this research is to design and study MWCNTs nanoparticles influence on polyethylene glycol PEG 400 thermophysical properties and structure. In order to accomplish this objective, four suspensions were manufactured and studied, along and in comparison with the base fluid. Structural analysis, in terms of powder X-ray Diffraction Stud...
Experimental work was performed in defining several properties for polyethylene glycol PEG 400 and nano-enhanced PEG 400 + ZnO in the range of mass percentages of up to 5 mass% ZnO. Thus, the article depicts several novel experimental data on viscosity and isobaric specific heat for PEG 400-ZnO nanoparticle enhanced fluids. The isobaric specific he...
This chapter presents several advantages and drawbacks of using nanofluids (NFs) in several conjugate heat and mass applications, with special focus on boiling heat transfer. At the present time, NFs are considered by many researchers as a good option in many industrial processes. As a definition, NFs are a stable and homogenous mixture of nanopart...
In recent years, magnetic nanofluids (MNFs) have attracted the attention of many researchers due to their capability to be controlled under magnetic fields. These working fluids are good candidates for the design and fabrication of new functional nanomaterials used in heat transfer applications. The current chapter is divided in two parts: in the f...
Polyethylene glycol is intensively studied as the base for new enhanced materials, while PEG 400 enhanced with nanoparticles may be seen as a new heat transfer fluid and its development is on its way. A number of reports were acknowledged in the recent literature, even if this research is ongoing and new hypothesis have to be further tested. This p...
This article depicts several novel experimental data on thermophysical properties of Al2O3/PEG 400 nanoparticle enhanced fluids. Both temperature variation and nanoparticle mass concentration are investigated as main factors for influencing the viscosity and heat capacity of studied nanofluids. Different approaches were used in this study to compar...
The purpose of this research is to study the forced convection heat transfer and flow characteristics of water base fly ash-Cu (80:20% by volume) hybrid nanofluid (HNF) flow through a copper tube under a constant heat flux (CHF) of 7962W/m² experimentally and numerically. The present work presents results for the concentrations of 0.5–2.0 vol% at a...
In this experimental study, nanofluids based on polyethylene-glycol PEG 400 enhanced with zinc and aluminum oxide nanoparticles were studied in terms of pH and electrical conductivity. The nanofluids were found to be stable with a pH in the range 7.45 to 8.90 at ambient temperature. Electrical conductivity was evaluated both at ambient temperature...
Ionic liquids suspensions with nanoparticles are a new class of heat transfer fluids and this study aim is to outline and discuss the behavior of a new ionanofluid in a real life configuration. If it shortly describes the considered ionic liquid, its main drawback is the high viscosity, thus limiting its applicability in natural convection and turb...
Ionic liquids are a new and challenging class of fluids with great and tunable properties, having the capability of an extensive area of real-life applications, from chemistry, biology, medicine to heat transfer. These fluids are often considered as green solvents. Several properties of these fluids can be enhanced by adding nanoparticles following...
Research on nanoparticle enhanced fluids has increased rapidly over the last decade. Regardless of several unreliable reports, these new fluids have established performance in heat transfer. Lately, polyethylene glycol with nanoparticles has been demarcated as an innovative class of phase change materials with conceivable uses in the area of convec...
Ionic liquids are a new opportunity for increasing convection heat transfer in several applications. Adding nanoparticles to these ionic liquids may enhance the heat transfer capability thus creating IoNanofluids as a pioneering type of fluids used for augmenting heat transfer in several applications, like solar energy.
Research on IoNanofluids is...
Developing materials that efficiently combine cutting-edge technology with competitive costs so as to meet technical, economic and, last but not least, environmental challenges are a must in the field of materials engineering and beyond. Ionic liquids are heat transfer fluids that offer a wide range of advantageous properties. One of the most recen...
This review discusses, in terms of practical aspects and future application, about heat transfer fluids properties with special focus on the possible use of ionic liquids in heat transfer applications. Even if some data were identified in the open literature, most of the ionic liquids studies on thermophysical properties are yet at the beginning an...
Temperature and loading dependences on the rheological behavior and isobaric specific heat capacity of several suspensions of alumina nanoparticles in a binary mixture of [C2mim][CH3SO3] ionic liquid and water were experimentally determined to assess its potential condition of enhanced heat transfer fluids. Rheological tests show a clear Newtonian...
The present study investigates the effect of ball milling on thermal conductivity and viscosity of stable nanofluid of fly ash from Indian coal. The particle size of fly ash decreased from micron size to 89, 55.5, and 11.5 nm with reduction by 55, 90, and 434 times, respectively, due to ball milling for 30, 40, and 60 hours. The surfactant Triton X...
Ionic liquids are one of the recent options for heat transfer enhancement due to their excellent features; nevertheless, their thermophysical and electrical properties estimation is a very challenging research goal. In the last years, several studies considered the addition of nanoparticles in the ionic liquids, thus resulting in better heat transf...
This paper involves a numerical study of several water-ionic liquids mixtures and nanoparticle enhanced ionic liquids starting from a less studied ionic liquid: 1-Ethyl-3-methylimidazolium Methanesul-fonate, [C 2 mim][CH 3 SO 3 ]. The research start point was several previous published experimental results in regard to the water-ionic liquid mixtur...
The idea of this handbook was to open a call for possible contributions in the field of nanofluids industrial applications in the energy sector among the Nanouptake network.
A similar structure has been followed in all contributions with a limit of two p: a) title, authors, affiliation, b) short description of the device c) effects following from...
Hybrid nanofluids are novel fluids developed as a consequence of the nanofluids research, involving pairs of nanoparticles or nanocomposite to overcome some barriers from simple nanofluids properties. This chapter summarizes some research on stability, pH, pumping power, and selection of nanoparticles to be able to develop ready to be implemented h...
In this paper an experimental investigation on fire retardancy of a new polymer nanocomposite derived from organic montmorillonite and exolit fire retardant in an acrylonitrile- butadiene-styrene copolymer by analyzing the flammability and fire behavior is described. The samples were prepared by melting and mixing nanocomposites and fire retardant...
This review discusses exclusively the recent research on electrical conductivity of nanofluids, correlations and mechanisms and aims to make an important step to fully understand the nanofluids behavior. Research on nanoparticle-enhanced fluids’ electrical conductivity is at its beginning at this moment and the augmentation mechanisms are not fully...
In this research, the electrical conductivity of simple and hybrid nanofluids containing Al2O3, TiO2 and SiO2 nanoparticles and water as the base fluid was experimentally studied at ambient temperature and with temperature variation in the range of 20–60 °C. A comparison of the experimental data with existing theoretical models demonstrated that th...
Numerical simulation of nanofluid flows is of maximum importance for a large area of applications, especially in the solar energy technology. Even though a lot of numerical studies are available in the open literature, there is still a large debate in regard to the most appropriate approach when dealing with nanofluids. Plus, a precise simulation o...
The present paper focuses on the analysis of the thermal conductivity for both base fluid and their ionanofluids. Sequently, an analysis of the new heat transfer fluids behavior in laminar flow was performed to compare the experimental and theoretical results. In terms of experimental, the results showed a higher thermal conductivity for the ionano...
In this experimental study, several alumina Nanoparticle Enhanced Ionic Liquids were prepared and studied in regard to their stability, pH, density and thermal conductivity. These new fluids were manufactured by dispersing aluminium oxide nanoparticles in different mixtures based on water and 1-ethyl-3-methylimidazolium methanesulfonate ionic liqui...
In the present paper, laminar forced convection nanofluid flows in a uniformly heated horizontal pipe are numerically carried out using the mixture model with base fluid temperature-dependent properties. The results are presented and discussed for five different values of TiO2 nanoparticle concentrations, namely Phi=0, 1, 2, 3 and 4 vol.% and three...
Nanofluids are new heat transfer fluids obtained by suspending different nanoparticles in a base fluid. This research deals with a complex numerical study on nanofluids heat transfer efficiency and pumping power for a certain fluid mechanics application. For this research, several oxide-based nanofluids and hybrid nanofluids were implemented in a n...
Nanofluids are on the top of the research interests of many groups due to their extraordinary heat transfer properties. Nevertheless, while the research was mainly focused on thermal conductivity and viscosity, another extremely relevant property, specific heat, remained little studied. Additionally, research is mainly directed towards alumina and...
A real necessity in the field of materials engineering and beyond is the development of new smart materials that effectively combine state-of-the-art technology with competitive costs to meet current technical requirements and challenges. In our days, fluids used in engineering occupy a significant place, and for their application in the industry,...
This research deals with experimental studies on thermal conductivity variation of Al2O3 and TiO2 hybrid nanofluids with water as the base fluid. In addition, Al2O3 and TiO2 nanofluid mixtures were used for evaluation. The prepared samples were tested for determination of thermal conductivity at room temperature as well as at different temperatures...
Conventional fluids have poor heat transfer properties, but their vast applications in power generation, chemical processes, heating and cooling processes, electronics and other microsized applications make the reprocessing of those thermofluids to have better heat transfer properties quite essential. Recently, it has been shown that the addition o...
This paper numerically investigates the heat transfer behavior of carbon nanotubes nanofluids under laminar forced flow in horizontal pipe. In order to describe better the nanofluids flow, the thermophysical properties were previously experimentally evaluated considering the influence of nanoparticle content and the effect of non-Newtonian nature o...
This paper shows an experimental study on thermal conductivity of hybrid nanofluids made of Al2O3–SiO2 suspended in pure water. Also, simple nanofluid samples, with various volume fractions of Al2O3 and SiO2 were prepared and used for comparison. Analysis clearly outlined the influence of volume fraction on thermal conductivity and few correlations...
Ionic liquid-based nanofluids are a very novel group of fluids used for enhancing heat transfer in different applications, especially in solar energy ones where the parabolic trough pipe receiver is subjected to heat flux due to the sun beam radiation. In regard to this new class of fluids, no empirical correlations are available for their heat tra...
Ionic liquids are an innovative class of fluids having a wide range of potential applications from chemical industries and processes to energy harvesting particularly in solar power plants. Also, these liquids are non-flammable and non-volatile at ambient conditions and recyclable, and are also considered as green fluids. All these important featur...
Ionic liquids are a new class of fluids to be considered for heat transfer due to their remarkable thermophysical properties. Experimental researches on ionic liquids have increased over the last few years and, as an extension, a new class of heat transfer fluids, the ionanofluids were considered in some recent experimental studies. Ionanofluids co...
Over the last years, tremendous efforts were dedicated to develop new heat transfer fluids. So, the research on this topic was later on focused on nanofluids, ionanofluids, molten salts and new refrigerants. This article explores two mono-component and one bi-component nanofluid and, to be more specific, it deals with the viscosity study of stabili...
This paper shows an experimental study on rheological behavior of hybrid nanofluids made of Al2O3–TiO2 suspended in pure water. Also, simple nanofluid samples, with various volume fractions of Al2O3 and TiO2 were prepared and used for comparison. Viscosity measurements were achieved at room temperature and the shear rate between 10 and 1000 1/s for...
Hybrid nanofluids are a novel class of colloidal fluids which have drawn significant attention due to potential tailoring of their thermo-physical properties for heat transfer enhancement by a combination of more than one nano-additive to meet specific requirements of an application. In the present work, ceramic copper oxide/carbon (SiO2-CuO/C) nan...
Research on solar energy depicted its ability to be converted into thermal energy using trough collector system and solar concentrators, and then to electrical energy using a steam turbine. In this article authors tried to review some solar applications of nanofluids with reference to hybrid nanofluids and their possible use for solar energy system...
Over the last decades, intensive studies are performed on nanofluids behavior in many real-life situations as well as in simulated conditions. A lot of nanofluids types and enclosures are present in the open literature and one can acknowledge the intensive efforts in describing especially alumina or CNT based fluids and circular configurations (i.e...
Nanofluids are advanced fluids with novel properties useful for diverse applications in heat transfer. This article reports the experimental determination of thermal conductivity and viscosity for silica (SiO2) nanofluids in ethylene glycol (EG) and glycerol (G) as base fluids. A two-step method was applied to disperse the nanoparticles in the base...
Ionanofluids are a very new class of nanofluids having ionic liquids as the base fluid. Thermophysical properties of base ionic liquids (ILs) and nanoparticle enhanced ionic liquids (NEILs) are part of studying a new class of fluids for heat transfer. NEILs are formed by dispersing different volume fractions of nanoparticles in a base ionic liquid....
The Prandtl number, Reynolds number and Nusselt number are functions of thermophysical properties of nanofluids, and these numbers strongly influence the convective heat transfer coefficient. The thermophysical properties vary with volumetric concentration of nanofluids. Therefore, a comprehensive analysis was performed to evaluate the effects on t...
Field-synergy analysis is performed on the water–oxide nanofluid flow in circular heat sinks to examine
the synergetic relation between the flow and temperature fields for heating processes. By varying
the Reynolds number and the nanoparticle volume fraction, the convective heat transfer of nanofluid
is investigated based on the field synergy numbe...
Over the past years, the development of functional heat transfer fluids by compounding different substances or different phases of matter (solid, liquid, or gas) has raised increasing interest in view of their potential applications in technologies. In particular, the nanofluids in which the solid particles (<100 nm or smaller) are incorporated as...
In some industrial heating processes, fuel represents only a very small fraction of the total cost of manufacturing. But in most industrial heating processes, fuel is a considerable expense. Since the last decade of the twentieth century, embargos, wars, regulations, and deregulations have caused the costs of oil and gas to go through unsettling fl...
Numerical and experimental researches on nanofluids have increased rapidly over the last few years. In spite of some inconsistent reports—mainly due to the deficient understanding of the involved mechanisms—nanofluids have developed as a favorable heat transfer fluid. Recently, hybrid nanofluids were defined as a new class of nanofluids with possib...
Even if the variation of Nusselt number with Reynolds number has been observed before, little to no studies are concerning nanofluids. The present numerical data in the laminar regime were also found to correlate well with the Brinkman number for the individual sets and much better globally, by combining all the data sets for nanofluids and water....
Nanofluids are considered to offer important advantages over conventional heat transfer fluids, but their thermophysical properties are not known precisely. In this paper, essential aspects of the turbulent-flow convective heat transfer of nanofluids are compared in detail based on few figures of merits relevant to their applications. The considere...
Published literature is rich with investigations of mechanical properties of composites,
but fewer publications are focused on thermal properties. Several publications addressing different
theoretical approaches for predicting thermal conductivity of composite materials have been noted.
However, one of the publications has discussed both transverse...
An innovative way of improving the thermal conductivities of fluids is to suspend small solid particles in the fluids. Various types of powders such as metallic, non-metallic and polymeric particles can be added into fluids to form slurries. The thermal conductivities of fluids with suspended particles are expected to be higher than that of common...